QUARTZITE Quartzite is a metamorphic rock formed when quartz sands are subjected to extreme heat and pressure due to tectonic forces. Pure quartzite is white. The individual quartz crystals are generally visible. |
See Steve's video interview about asteroid capture at Moonandback: Part 1 Part 2 Part 3 |
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See Steve's blog Ramblings On The Future Of Humanity (recent post) A Project Plan for Space Based Solar Power
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